ethinyl estradiol


Definition of ethinyl estradiol

: a very potent synthetic estrogen C20H24O2 used especially as an oral contraceptive

Examples of ethinyl estradiol in a Sentence

Recent Examples on the Web Taytulla, also called ethinyl estradiol, gained Food and Drug Administration approval in 2013. Austen Hufford, WSJ, 29 May 2018 Tyler’s experiments looked at one type of synthetic estrogen: ethinyl estradiol, or EE2, which is found in oral contraceptives like TriNessa and Seasonique. Becky Little, Smithsonian, 31 July 2017 One environmental estrogen is ethinyl estradiol—a chemical found in birth control pills. National Geographic, 3 Feb. 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ethinyl estradiol.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of ethinyl estradiol

1938, in the meaning defined above

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The first known use of ethinyl estradiol was in 1938

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Cite this Entry

“Ethinyl estradiol.” Dictionary, Merriam-Webster, Accessed 5 Jul. 2022.

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More Definitions for ethinyl estradiol

ethinyl estradiol

variants: or ethynylestradiol \ ˌeth-​ə-​nil-​ˌes-​trə-​ˈdī-​ˌȯl How to pronounce ethinyl estradiol (audio) , -​ˌōl How to pronounce ethinyl estradiol (audio) \ or chiefly British ethinyloestradiol or ethynyloestradiol \ ˌeth-​ə-​nil-​ˌē-​strə-​ˈdī-​ˌȯl How to pronounce ethinyl estradiol (audio) , -​ē-​ˈstrad-​ē-​ˌȯl How to pronounce ethinyl estradiol (audio) , -​ˌōl \

Medical Definition of ethinyl estradiol

: a white crystalline very potent synthetic estrogen C20H24O2 prepared from estrone and used in combination (as with norgestrel or norethindrone) as a birth control pill or alone in the treatment of menopausal symptoms or female hypogonadism or in the palliative treatment of prostate or breast cancer — see loestrin, minastrin, nuvaring, ortho evra, ortho-novum, ortho tri-cyclen, seasonale, seasonique, yasmin, yaz


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